Erratum to: Topical issue on Lattice Field Theory during the Covid-19 pandemic.

[This corrects the article DOI: 10.1140/epja/s10050-021-00614-5.].

Effects of heavy sea quarks at low energies.

We present a factorization formula for the dependence of light hadron masses and low energy hadronic scales on the mass M of a heavy quark: apart from an overall mass-independent factor Q, ratios such as r_{0}(M)/r_{0}(0) are computable in perturbation theory at large M. The perturbation theory part is stable concerning different loop orders. Our nonperturbative Monte Carlo results obtained in a model calculation, where a doublet of heavy quarks is decoupled, match quantitatively to the perturbative prediction.